Patents Assigned to eMAGIN Corporation
  • Patent number: 10483478
    Abstract: A tandem Organic Light Emitting Diode (OLED) apparatus and method of fabricating the same, where the tandem OLED apparatus includes a buffer assisted charge generation layer having a junction of a p-type doped semiconductor layer and an n-type doped semiconductor layer, where a hole buffer layer and an electron buffer layer pair surrounding the junction of the p-type and n-type doped semiconductor layers. The OLED apparatus further includes a first OLED emissive layer and a second OLED emissive layer pair surrounding the buffer assisted charge generation layer, and a cathode and anode layer pair further surrounding the first and second OLED emissive layer pair.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: November 19, 2019
    Assignee: eMagin Corporation
    Inventors: Qi Wang, Evan P. Donoghue, Ilyas I. Khayrullin, Tariq Ali, Kerry Tice, Amalkumar P. Ghosh
  • Patent number: 10386731
    Abstract: A direct-deposition system capable of forming a high-resolution pattern of material on a substrate is disclosed. Vaporized atoms from an evaporation source pass through a pattern of through-holes in a shadow mask to deposit on the substrate in the desired pattern. The shadow mask is held in a mask chuck that enables the shadow mask and substrate to be separated by a distance that can be less than ten microns. As a result, the vaporized atoms that pass through the shadow mask exhibit little or no lateral spread (i.e., feathering) after passing through its apertures and the material deposits on the substrate in a pattern that has very high fidelity with the aperture pattern of the shadow mask.
    Type: Grant
    Filed: May 23, 2017
    Date of Patent: August 20, 2019
    Assignee: eMagin Corporation
    Inventors: Amalkumar P. Ghosh, Fridrich Vazan, Munisamy Anandan, Evan Donoghue, Ilyas I. Khayrullin, Tariq Ali, Kerry Tice
  • Patent number: 10297645
    Abstract: A full-color display panel is provided comprising a repeating super-pixel block including four pixel units, wherein each of the pixel units has a first sub-pixel configured to emit a first color light, a second sub-pixel configured to emit a second color light, and a third sub-pixel configured to emit a third color light. The first or second sub-pixel abuts the same-color sub-pixel of the adjacent pixel unit thereof to form at least a double-sized sub-pixel area. The third sub-pixel abuts the same-color sub-pixel of all adjacent pixel units thereof to form at least a quadruple-sized sub-pixel area. The first color light, the second color light, and the third color light are one of emitted through or from respective organic layers of the first color sub-pixel, the second color sub-pixel and the third color sub-pixel.
    Type: Grant
    Filed: September 6, 2017
    Date of Patent: May 21, 2019
    Assignee: eMagin Corporation
    Inventor: Ihor Wacyk
  • Patent number: 10147906
    Abstract: A high efficacy multi-layer seal structure formed on an organic light emitting diode device and the process for depositing the same. A thin film seal is formed over the substrate having OLED layers, and includes a first metallic layer formed over the substrate, an inorganic layer formed over the first metallic layer, and a second metallic layer formed of the inorganic layer. The metallic layers comprise one or more oxide or nitride layers, each oxide or nitride comprising a metal. The inorganic layer comprises a metal oxide, a metal nitride or a metal oxynitride. The process for forming the multi-layer seal structure includes depositing the first metallic layer over the substrate using atomic layer deposition, depositing the inorganic layer over the first metallic layer using sputtering, and then depositing the second metallic layer over the inorganic layer using atomic layer deposition.
    Type: Grant
    Filed: February 6, 2015
    Date of Patent: December 4, 2018
    Assignee: eMagin Corporation
    Inventors: Amalkumar Ghosh, Fridrich Vazan
  • Patent number: 10128317
    Abstract: An OLED microdisplay comprising a substrate, a pixel array and a patterned conductive layer underneath the anode pad array to form an effective ground plane in order to greatly reduce or eliminate electrical cross-talk between pixels, and a method for fabricating same.
    Type: Grant
    Filed: December 16, 2015
    Date of Patent: November 13, 2018
    Assignee: eMagin Corporation
    Inventor: Ihor Wacyk
  • Patent number: 10072328
    Abstract: A direct-deposition system capable of forming a high-resolution pattern of material on a substrate is disclosed. Vaporized atoms from an evaporation source pass through an aperture pattern of a shadow mask to deposit on the substrate in the desired pattern. Prior to reaching the shadow mask, the vaporized atoms pass through a collimator that operates as a spatial filter that blocks any atoms not travelling along directions that are nearly normal to the substrate surface. As a result, the vaporized atoms that pass through the shadow mask exhibit little or no lateral spread (i.e., feathering) after passing through its apertures and the material deposits on the substrate in a pattern that has very high fidelity with the aperture pattern of the shadow mask. The present invention, therefore, mitigates the need for relatively large space between regions of deposited material normally required in the prior art, thereby enabling high-resolution patterning.
    Type: Grant
    Filed: May 17, 2017
    Date of Patent: September 11, 2018
    Assignee: eMagin Corporation
    Inventors: Amalkumar P. Ghosh, Fridrich Vazan, Munisamy Anandan, Evan Donoghue, Ilyas I. Khayrullin, Tariq Ali, Kerry Tice
  • Patent number: 9984616
    Abstract: A system and method for repairing an OLED display having an array of OLED pixels including at least one inoperative OLED pixel, wherein each OLED pixel is controlled by a pixel driver circuit having a fusible element. The system includes a first switch for reducing an energizing signal to the OLED pixel array, the energizing signal exceeding a threshold level below which the OLED pixels should not emit light. A second switch is provided for increasing a bias signal to the OLED pixel array, the bias signal exceeding a threshold level above which the fusible element of the inoperative OLED pixels are blown, such that inoperative OLED pixels no longer emit light.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: May 29, 2018
    Assignee: eMagin Corporation
    Inventor: Ihor Wacyk
  • Publication number: 20180075811
    Abstract: An image rendering system comprising a pixel array and variable-density column and row scanner circuits is disclosed. The variable-density column and row scanner circuits enable software-based reconfiguration of the active display area within the available screen area of the display. In addition, a hardware restore-to-black function is provided that enables pixels outside of the desired image region to be driven to black without their requiring image data or excitation. As a result, the functionality of the functionality of the display can be reconfigured to match the desired image region on a frame-by-frame basis. Therefore, displays in accordance with the present invention can operate at higher frame rates and with less power consumption that prior-art displays.
    Type: Application
    Filed: August 1, 2017
    Publication date: March 15, 2018
    Applicant: eMagin Corporation
    Inventors: Ihor WACYK, Harrison KWON, Russ DRAPER, Dave FELLOWES
  • Patent number: 9899456
    Abstract: An organic light-emitting diode (OLED) display device is provided having a color emission layer including a plurality of organic light-emitting elements in a first arrangement and an electronics layer. The electronics layer includes a plurality of pixel drive circuits each including an electrode contact. The electronics layer includes a plurality of independently addressable sub-regions each sub-region including an identical pattern of electrode contacts created using a single reticle exposure. Each sub-region is orientated differently within a plane such that the first arrangement of light-emitting elements is electrically connected to the patterned electronics layer.
    Type: Grant
    Filed: May 2, 2016
    Date of Patent: February 20, 2018
    Assignee: eMagin Corporation
    Inventors: Amalkumar P. Ghosh, Andrew G. Sculley, Ihor Wacyk, Harrison Kwon, John Ho, Andrew Rosen
  • Patent number: 9793252
    Abstract: A method of fabricating an active matrix display is disclosed in which one or more oxide thin film transistors is monolithically integrated with an inorganic light emitting diode structure. The method comprises forming an array of inorganic light emitting diodes over a substrate defining a plurality of sub-pixels, depositing an insulating layer over the inorganic LED array, forming conductive vias through the insulating layer, one via for each LED in the LED array, and forming a metal oxide thin film transistor backplane, including an array of pixel driver circuits, over the dielectric layer and conductive vias, wherein one driver circuit electrically controls each sub-pixel through the dielectric layer.
    Type: Grant
    Filed: March 30, 2016
    Date of Patent: October 17, 2017
    Assignee: eMagin Corporation
    Inventor: Amalkumar P. Ghosh
  • Patent number: 9733481
    Abstract: An immersive headset device is provided that includes a display portion and a body portion. The display portion may include microdisplays having a compact size. The microdisplays may be movable (e.g., rotational) relative to the body portion and can be moved (e.g., rotated) between a flipped-up position and a flipped-down position. In some instances, when the microdisplays are flipped up, the headset provides an augmented reality (AR) mode to a user, and when the microdisplays are flipped down, the headset provide a virtual reality (VR) mode to the user. In certain implementations, the headset includes an electronics source module to provide power and/or signal to the microdisplays. The electronics source module can be attached to a rear of the body portion in order to provide advantageous weight distribution about the head of the user.
    Type: Grant
    Filed: May 9, 2016
    Date of Patent: August 15, 2017
    Assignee: eMagin Corporation
    Inventors: Jerome T. Carollo, Amal Ghosh, John Chi-Liang Ho, Andrew Thomas Manning Rosen
  • Patent number: 9489887
    Abstract: An active-matrix organic light-emitting diode microdisplay device having a temperature control system including a temperature sensor and a control means for regulating the temperature of the OLED. The temperature is regulated by a bias transistor within the circuit, operating as a function of the temperature of the panel, such that low panel temperatures cause an increase in voltage of the bias transistor which draws a higher current through the top voltage drive transistor for self-heating the area surrounding the OLED.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: November 8, 2016
    Assignee: eMagin Corporation
    Inventors: Ihor Wacyk, Olivier Prache
  • Patent number: 9443913
    Abstract: A color display is provided that includes a light emitting sub-pixel and a filter layer including first and second color filter materials. The first color filter material is adapted to reduce transmittance of visible light outside a first transmittance spectrum corresponding to a first color, and the second color filter material is adapted to reduce transmittance of visible light outside a second transmittance spectrum corresponding to a second color. The second color is different than the first color. A color display having a white-balanced pixel is provided. A method of white-balancing a light emitting device is provided. A method of reducing unwanted light output due to electrical leakage is provided to fall below a pre-determined threshold. An opaque layer may be interposed between the sub-pixels and/or may frame illuminated areas of sub-pixels, and may be a combination of red, green, and/or a blue filter material.
    Type: Grant
    Filed: June 27, 2011
    Date of Patent: September 13, 2016
    Assignee: eMagin Corporation
    Inventors: Amalkumar P. Ghosh, Scott Ziesmer, Ilyas Khayrullin
  • Patent number: 9385323
    Abstract: A method of making a patterned OLED layer or layers. The method uses a shadow mask having, for example, a free-standing silicon nitride membrane to pattern color emitter material with a feature size of less than 10 microns. The methods can be used, for example, in the manufacture of OLED microdisplays.
    Type: Grant
    Filed: September 9, 2015
    Date of Patent: July 5, 2016
    Assignees: University of Rochester, eMagin Corporation
    Inventors: Charles K. Chan, Ching W. Tang, Fridrich Vazan, Amal Ghosh
  • Patent number: 9366871
    Abstract: An immersive headset device is provided that includes a display portion and a body portion. The display portion may include microdisplays having a compact size. The microdisplays may be movable (e.g., rotational) relative to the body portion and can be moved (e.g., rotated) between a flipped-up position and a flipped-down position. In some instances, when the microdisplays are flipped up, the headset provides an augmented reality (AR) mode to a user, and when the microdisplays are flipped down, the headset provide a virtual reality (VR) mode to the user. In certain implementations, the headset includes an electronics source module to provide power and/or signal to the microdisplays. The electronics source module can be attached to a rear of the body portion in order to provide advantageous weight distribution about the head of the user.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: June 14, 2016
    Assignee: EMAGIN CORPORATION
    Inventors: Amal Ghosh, John Chi-Liang Ho, Andrew Thomas Manning Rosen
  • Patent number: 9142779
    Abstract: A method of making a patterned OLED layer or layers. The method uses a shadow mask having, for example, a free-standing silicon nitride membrane to pattern color emitter material with a feature size of less than 10 microns. The methods can be used, for example, in the manufacture of OLED microdisplays.
    Type: Grant
    Filed: August 6, 2014
    Date of Patent: September 22, 2015
    Assignees: University of Rochester, eMagin Corporation
    Inventors: Charles K. Chan, Ching W. Tang, Fridrich Vazan, Amal Ghosh
  • Patent number: 8974263
    Abstract: A method for manufacturing an organic light emitting diode (OLED) array is provided that includes applying an energizing signal to at least one of the OLED pixels in the array. The energizing signal exceeds a threshold level. The method also includes reducing the energizing signal and identifying an OLED in the array that continues to remain energized. The method further includes irradiating the identified OLED to degrade the organic material in the OLED. A method of performing quality control in a manufacturing process of an OLED array is provided. The method includes determining an intensity, a time and a wavelength of radiation sufficient to render an OLED of the OLED array inoperative by degrading organic material in the OLED. A system of performing quality control in a manufacturing process of an OLED array is provided. A computer-readable medium having stored thereon computer-executable instructions is provided.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: March 10, 2015
    Assignee: eMagin Corporation
    Inventor: Amalkumar P. Ghosh
  • Patent number: 8975832
    Abstract: A display and method of making a display, comprising first and second stacked, non-inverted, dielectrically isolated, organic light emitting diodes formed on a silicon on insulator substrate. The display includes a means for applying both a positive or negative voltage across the stack, and a common intermediate control node situated between the diodes. The control node is electrically connected through vias to receive a control voltage signal, such that altering the relationship between the control voltage signal and the voltage applied across the stack regulates the actuation of the individual diodes.
    Type: Grant
    Filed: March 5, 2012
    Date of Patent: March 10, 2015
    Assignee: eMagin Corporation
    Inventors: Ilyas I. Khayrullin, Amalkumar P. Ghosh, Ihor Wacyk
  • Patent number: 8961254
    Abstract: A method for manufacturing an organic light emitting diode (OLED) array is provided that includes applying an energizing signal to at least one of the OLED pixels in the array. The energizing signal exceeds a threshold level. The method also includes reducing the energizing signal and identifying an OLED in the array that continues to remain energized. The method further includes irradiating the identified OLED to degrade the organic material in the OLED. A method of performing quality control in a manufacturing process of an OLED array is provided. The method includes determining an intensity, a time and a wavelength of radiation sufficient to render an OLED of the OLED array inoperative by degrading organic material in the OLED. A system of performing quality control in a manufacturing process of an OLED array is provided. A computer-readable medium having stored thereon computer-executable instructions is provided.
    Type: Grant
    Filed: October 5, 2010
    Date of Patent: February 24, 2015
    Assignee: eMagin Corporation
    Inventor: Amalkumar P. Ghosh
  • Patent number: 8944873
    Abstract: A method for manufacturing an organic light emitting diode (OLED) array is provided that includes applying an energizing signal to at least one of the OLED pixels in the array. The energizing signal exceeds a threshold level. The method also includes reducing the energizing signal and identifying an OLED in the array that continues to remain energized. The method further includes irradiating the identified OLED to degrade the organic material in the OLED. A method of performing quality control in a manufacturing process of an OLED array is provided. The method includes determining an intensity, a time and a wavelength of radiation sufficient to render an OLED of the OLED array inoperative by degrading organic material in the OLED. A system of performing quality control in a manufacturing process of an OLED array is provided. A computer-readable medium having stored thereon computer-executable instructions is provided.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: February 3, 2015
    Assignee: eMagin Corporation
    Inventor: Amalkumar P. Ghosh